90565709380 has 12 divisors (see below), whose sum is σ = 190187989740. Its totient is φ = 36226283744.

The previous prime is 90565709369. The next prime is 90565709401. The reversal of 90565709380 is 8390756509.

It can be written as a sum of positive squares in 2 ways, for example, as 21063877956 + 69501831424 = 145134^2 + 263632^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264142715 + ... + 2264142754.

It is an arithmetic number, because the mean of its divisors is an integer number (15848999145).

Almost surely, 2^90565709380 is an apocalyptic number.

It is an amenable number.

90565709380 is an abundant number, since it is smaller than the sum of its proper divisors (99622280360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90565709380 is a wasteful number, since it uses less digits than its factorization.

90565709380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528285478 (or 4528285476 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 90565709380 in words is "ninety billion, five hundred sixty-five million, seven hundred nine thousand, three hundred eighty".